Multiple Device Formatting Only Works in Simulator

[ASTRELION]

Using this doc, I decided to separate my styles.css file into a styles.css and styles~300x300.css. For some reason, it only properly works on the sim and whenever I install on a physical device the styles for Versa do not apply. Any ideas for the reason for this? Keep in mind my clockface only has simple text and icons, so it shouldn't be any sort of scaling problems.

This is my first Fitbit app, so maybe I'm missing something completely obvious.

[JonFitbit]

Both files exist in the resources folder?

In your gui file, are you just referencing styles.css?

Like:

<link rel="stylesheet" href="styles.css" /> 

[ASTRELION]

Yes and yes.